Yobidashi vs. Hyoshigi — What's the Difference?

Difference Between Yobidashi and Hyoshigi
Definitions
Yobidashi➦
A yobidashi (呼出 or 呼び出し, announcer or beckoner) is an announcer who calls a professional sumo wrestler, or rikishi, to the dohyō (wrestling ring) immediately prior to his bout. He does this by calling the name of each wrestler fighting in turn whilst holding a traditional folding fan.
Hyoshigi➦
(sumo) One of the wooden sticks that are clapped by the yobidashi to draw the spectator's attention.
Yobidashi➦
(sumo) Any of the functionaries whose tasks include building the dohyo, making announcements, singing the shikona of each rikishi and advising them of preparation time.